Removable bit chuck for die heads



v c. w. sTYRoN l REMVABLE BIT CHUCK FOR DIE. HEADS Filed March 27. 1924 aum: m14

Patented Junev, 1925.

UiNiTgiEn s Tarn-:s

zrarfsni for aies.

CHARLIE'W. STYRON,OF MOREHEAD CITY, .NORTH i .p REMOVABLE'- Brr CHUCK ron-DIE HEADS.

Application led March 27,1924. Serial` No. 702,267. n l

' type .just mentioned whereby the latter may be transformed temporarily or permanently into a-chuclr for holding drills, reamers, taps and the like and my primary object is the provision of such chuck forming means applicable to a die head upon removal fof its usual threading .bits and without requiring other changes or reconstruction ofthe head and also without impairing' the-latter for subsequent use vin its usual andjerdinary functions.

According to my invention in a general way chuck forming means are proposed inm cluding adjustable jaws Iand ajaw holder together with jaw adjusting means in connectionwith .the holder, the holder and its parts being shaped to `interiit a die head and being provided with means adapted to coact with the usual bit seats in order to effect a driving connection between the-die head and thevjaw holder.

- such that they may be readily associated with a die head upon removal of its usual threadinfYV bits so' that the chuck ma Vsu nOrtav drill, reamer, ytap or the like for operation through the ordinary actuation of ythedie head, and the parts are furthermore associated with the die head in such manner that they may be readily removed and the die head used Vfor its ordinaryvpurposes without difficulty.

In Athe accompanying drawing which killustrates my present invention and formsa part of this specification,

Figure l is a central longitudinal section through a die head equipped with-fthe improvements proposed by my invention, I

Figure 2 is aI perspective view showing'the several parts of the die head and my invention as applicable thereto, in detached relation, and

Figure 3 is a central longitudinal section `through a slightly different form of die head.

Referring now to these figures and particularly to Figures l and 2 I have shown a die head 10 having a circumferential ange ll therearound which is radially slotted as at l2, the radial slots l2 forming seats for the threading dies or bits, which are con- These several parts arey fined by a clamping ring, 13" whichin the connected positionisseated against thefla-nge l1-and secured to theA latter by a series of clamping screws 14 .whose heads are countersunk inthe die head, these screws extending througlnapertures 15 in the diehead andinto threaded aperturesv 16 ofthe clamping ring.

lIt is `thus obvious v that upon lremoval ofthe clamping ring 13,` the bits. may be removedfrom the slots or -loitlseatsv 12. `.This diehead also yhas a cylindrical extension 17 provided withl a circumferential-iseries ofqlengthwise grooves 18 which in practice fcoact withvdogs or pawls in ythe dieheadholder orha'ndle in order to complete the ratchet connection. Thiscylindrical extension 17 also has v4a lengthwise bore 19y oneend of which opens into; the head -10 vvithingthe flange-11.

In Figure 3-I have. shownl a slightly dif-f ferent form of gdie head 105?, which ,employs a ianged clampingring 13a' around ythe `pe-y riphery-thereof, heldin place kby clamping screwsj 14a through the flangeof this clamping ring-,and into the flange. 11a of the-die head. l.'Ihe-flange llav is, howeverr adially slotted to form bit seats the, same as the die head lOof Figures l` and@ andthe die head 10 of Figure 3 also has a. cylindricall enten-v sion '171 provided -witlraulengthwise ,bore and having an anIiula-rlyy grooved external surface provided withlengthwise ribs 18a` at Y f radially slotted flange, `this I`jaw ,head ,beingprovided with radially outstanding lugs v2l adapted to .project into the dieheadflange slotsinorder to complete a` driving connecf tion between thedie head andthe jaw, holder. The jawholder 20is alsoproyided with va .rectangular axial opening.A I22 vand withV- shaped grooves 23 at opposite sides of the opening 22, both the opening 22 and grooves 23 being extended through a cylindrical er.w

tension 24 of the jaw holder whichis of substantially reduced diameter with respect to `the bore of the die head extension and is adapted to receive thereover the sleeve por-k tion 25 of a jaw adjusting member also including a lrnurled ring 26 at one end of the sleeve. n assembling the jaw holder and jaw adjusting member the former is projected into the bore of the die head eX- tension through the die head while the sleeve 25 iS extended into the die head extension from its opposite end and telescopes the extension 24 of the jaw. holder, the sleeve 25 movably interittingthe bore of the die head extension. In this way the lrnurled adjusting ring 26 abuts the opposite end of the die head extension with respect to the die head itself as plainly seen in Figures l and 3. The jaws 27 of the chuck are Ylo-rmed upon the adjacent ends of a. pair oi' spring arms 28 projecting in approximately .parallel relationfrem and preferably integral with a block 29 of rectangular iorin having at opposite sides threads 30; to cooperate with the internal threads 3l of the adjusting sleeve 25 and also having V-shaped ribs 32 to cooperate with the il-shaped grooves 23 of the aw holder previously mentioned. lt Will be noted that the block 29 is generally shaped to movably-interit the axial opening 23 of the jaw holder and is of 'slightly greater width in one direction than the diameter of the jaw holder extension 2li so that the threaded portions 30 thereofy project slightly beyondr the surface or the entension 2li for effec-tive engagen'ient by the internal threads 3l of the adjusting` sleeve 25. It will alsol be noted that the jaws 2'? are formed by enlargements at the free ends of the spring arms 28 so that as the jaw block with the jaws is drawn into the jaw holder the jaws 27 will be gradually forced together by virtue of engagement with the side walls of the opening 22 or the jaw holder. lt is obvious that this is accomplished by `rotating the lrnurled ring clockwise, while counter-clocirwise movement of the lrnurled ring forces the aws outwardly so that they may .spread farther apart.

lVith the parts :assembled as previously described and with the jaws and jaw block extended into the jaw holder and its extension 24; and effectively engaged by the sleeve 25, the assembly is completed by a flanged cap 33 which extends over the iree end o1e the aw holder extension 2d and against the lrnurled adjusting ring this cap being held in place by a. screw 34: which extends axially therethrough and threads axially into the end of t-he jaw holder extension 24:. The screw 34, is preferably .shouldered in order that it may be turned tightly against ,shown in Figures l and 3 but are also adapted to effectively and efficiently carry ont the objects first above stated.

l claim:

l. Chuck forming 4means applicable to die heads having radial bit seats, said means including a. holder havingl radially outstanding lugs adapted to engage said seats and a cylin-lrical extension, the said holder and its extension being longitudinally slotted, jaws adjustable in the slot or the holder, having a threaded portion movable in the slot of the holder extension and projecting therefrom at diametrioally oppositepoints, an adjusting member including an adjusting ring and a sleeve telescoping the holder extension7 the ring cooperating with said cylindrical eXtension and the sleeve being internally threaded to engage the threaded portions of the jaw, and means to support the said adjusting member longitudinal displacement with respect to the holder.

Chuck forming means for die heads having radial bit seats, said mea-ns including thi ise slotted holder having radially ontst nding lugs adjacent to one end adapted to engage said seats, jaws movable lengthwise and non-rotatable in the slot of the holder7 and an adjusting member rotatable on the holder and held against lengthwise displacement with. respect thereto,y the said adjusting member and said jaws having threaded portions as derelatively engaging scribed.

8. Chuck forming means for die heads having radial bit seats, saidy means including an axially slotted holder having radially outstanding lugs adaptez to enwaoe said D Q .L 2n b seats and having a lengthwise slotted cylindrical extension, aws movable through the slot oi the holder and withinr the slotted eirtension thereof, and an adjusting member on the extension of the holder having means engaging the jaws to shift the latter in the .said holder.

in testimony whereoi2 l hereunto` aliiX my signature.

canarini w. srrRoii-f.v 

